#include<string.h>
#include<stdio.h>
#include<stdlib.h>

int main()
{
    char who[32];
    strcpy(who,getenv("USER"));

    if(strcmp(who,"root") == 0)
    {
        printf("I'm root\n");
    }
    else
    {
        printf("Not root, warning!\n");
    }
    return 0;
}
